Effect of excess silicon content on the formation of nano-layered Ti 3 SiC 2 ceramic via infiltration of TiC preforms

Foratirad, Hamze; Baharvandi, Hamid Reza; Maraghe, Mohammad Ghanadi

doi:10.1016/j.jeurceramsoc.2016.09.004

Cited by 20 publications

(18 citation statements)

References 29 publications

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“…Slice shapes of Ti 3 Si(Al)C 2 are obvious in regions 2 and 3, confirmed by the EDS analysis shown in Figure 6f. In the loading process, deformation modes of delamination and kink band occur to promote the crack deflection, which absorbs a considerable amount of energy and helps improve the bending strength [18]. These energy-absorbing mechanisms of Ti 3 Si(Al)C 2 suggest that the fabricated composites infiltrated by the Al alloy with Ti exhibited some ductility.…”

Section: Resultsmentioning

confidence: 99%

“…To improve the wettability and avoid the formation of Al 4 C 3 , the addition of elemental Si and Ti was proposed [12,13,14,15,16]. Adding Ti to the Al–Si system results in a new Ti 3 Si(Al)C 2 phase in situ in the SiC matrix; this is a novel structural material having a high toughness because of the combination of the ceramic and metallic properties [17,18,19]. Ti 3 Si(Al)C 2 can be combined with SiC to improve the overall performance of the material through the RMI, making it suitable for use under complex service conditions [20].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Ti Addition on the Microstructure and Mechanical Properties of SiC Matrix Composites Infiltrated by Al–Si (10 wt.%)–xTi Alloy

Zhao

et al. 2019

Materials

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This paper proposes a simple reactive melt infiltration process to improve the mechanical properties of silicon carbide (SiC) ceramics. SiC matrix composites were infiltrated by Al–Si (10 wt.%)–xTi melts at 900 °C for 4 h. The effects of Ti addition on the microstructure and mechanical properties of the composites were investigated. The results showed that the three-point bending strength, fracture toughness (by single-edge notched beam test), and fracture toughness (by Vickers indentation method) of the SiC ceramics increased most by 34.3%, 48.5%, and 128.5%, respectively, following an infiltration with the Al–Si (10 wt.%)–Ti (15 wt.%) melt. A distinct white reaction layer mainly containing a Ti3Si(Al)C2 phase was formed on the surface of the composites infiltrated by Al alloys containing Ti. Ti–Al intermetallic compounds were scattered in the inner regions of the composites. With the increase in the Ti content (from 0 to 15 wt.%) in the Al alloy, the relative contents of Ti3Si(Al)C2 and Ti–Al intermetallic compounds increased. Compared with the fabricated composite infiltrated by an Al alloy without Ti, the fabricated composites infiltrated by Al alloys containing Ti showed improved overall mechanical properties owing to formation of higher relative content Ti3Si(Al)C2 phase and small amounts of Ti–Al intermetallic compounds.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Ti Addition on the Microstructure and Mechanical Properties of SiC Matrix Composites Infiltrated by Al–Si (10 wt.%)–xTi Alloy

Zhao

et al. 2019

Materials

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“…First the porous preform is produced, where compositions such as TiC x (0.5 > x > 1), TiC/C, TiC/ TiO 2 or TiC/Ti have been reported. 176,177,178,179,180 Then, the porous preforms are infiltrated with the molten metal at high temperatures under argon atmosphere. Silicon is infiltrated at 1500°C-1600°C, while aluminum and tin required lower temperatures, >1000°C and > 500°C, respectively.…”

Section: Reactive Melt Infiltrationmentioning

confidence: 99%

“…In spite of this promising outcome, the most used approach for MAX phases so far is the combination of 3D printing of a porous carbide, followed by liquid silicon infiltration or reactive melting infiltration with aluminum to synthesize Ti 3 SiC 2 and Ti 3 AlC 2 , respectively. 176,260,261,262 Densities are high, but the main problem is the low yield of the synthesis reaction that ranges between 50 and 90 wt%. A similar concept was performed to produce gears by laminated object manufacturing.…”

Section: Near Net Shapingmentioning

confidence: 99%

Processing of MAX phases: From synthesis to applications

2020

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MAX phases are well-known and established due to their unique combination of properties and versatility, but this family of materials has experienced several ups and downs during its short history, including even being referred to with different names. Extensive work was carried out in the early 1960s in Vienna (Austria) by Wolfgang Jeitschko and Hans Nowotny, who discovered in more than 100 new carbides and nitrides. 1 Among them, they reported a new class of ternary systems, based on a transition metal (M), a metalloid (Me), and carbon (C), with a similar crystal structure to carbon-stabilized β-manganese phase, that is, Mo 3 Al 2 C. They were classified as "H-Phases" due to their hexagonal crystal structure, and some compositions

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“…Gel‐casting represents a relatively novel approach that involves the forming of colloidal ceramic components by combining traditional ceramic processing with polymer chemistry. This method has been successfully used to prepare a variety of engineered porous ceramics such as Al 2 O 3 , Si 3 N 4 , SiC, MgAl 2 O 4 , and others without the need for additional pore‐forming agents.…”

Section: Introductionmentioning

confidence: 99%

Electronically conductive porous TiN ceramics with enhanced strength by aqueous gel‐casting

et al. 2018

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In this paper, we report on a study of electronically conductive porous TiN ceramics prepared by aqueous gel‐casting. The effects of solid loading, sintering temperature, and sintering aids on the phase composition, microstructure, and volume fraction of porosity of the prepared porous TiN ceramics are studied. The SEM results show that porosity is uniformly distributed in all of the samples studied. With increasing solid loading and sintering temperature, the volume fraction of porosity decreases slowly. Moreover, the relationship between volume fraction of porosity and mechanical and electrical properties has also been investigated. Our results show that adding Y2O3‐TiO2 as combined sintering aids results in a sharp decrease in the volume fraction of porosity, and the volume fraction range changes from 42%‐60% to 28%‐52%. Moreover, adding sintering aids results in an increase in flexural strength and electrical conductivity with a change in maximum value from 34.6 MPa and 2.3 × 104 S∙m−1 to 101.6 MPa and 5.1 × 104 S∙m−1, respectively.

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Effect of excess silicon content on the formation of nano-layered Ti 3 SiC 2 ceramic via infiltration of TiC preforms

Cited by 20 publications

References 29 publications

Effect of Ti Addition on the Microstructure and Mechanical Properties of SiC Matrix Composites Infiltrated by Al–Si (10 wt.%)–xTi Alloy

Effect of Ti Addition on the Microstructure and Mechanical Properties of SiC Matrix Composites Infiltrated by Al–Si (10 wt.%)–xTi Alloy

Processing of MAX phases: From synthesis to applications

Electronically conductive porous TiN ceramics with enhanced strength by aqueous gel‐casting

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